1616681-38-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1616681-38-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,1,6,6,8 and 1 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1616681-38:
(9*1)+(8*6)+(7*1)+(6*6)+(5*6)+(4*8)+(3*1)+(2*3)+(1*8)=179
179 % 10 = 9
So 1616681-38-9 is a valid CAS Registry Number.